Drawing-knife



(No Model.)

J. S. GANTELO.

DRAWING KNIFE.

No. 454,848. Patented 'June so, 1891.

ms wams Penas an., suero-urna., msnmaron. u4 c.

" Nrrnn STATES- JOHN S. CANTELO, OF IOSTON, MASSACHUSETTS.

DRAWING-KNIFE.

SPECIFICATION forming part of Letters Patent No. 454,848, dated June 80,1891.

Application tiled April 14, 1890.

Serial No. 347,744. (No model.)

.T0 all whom 25 may concern:

Be it known that I, JOHN S. CANTELO, aV citizen of the United States,and a resident of Boston, in the county of Suffolk and State ofMassachusetts, have invented new and useful Improvements inDrawing-Knives, of which the following, taken in connection with theaccompanying drawings, is aspeciiication.

This invention relates to improvements on that kind of drawing-knives onwhich the handles are adjustable relative to the blade; and this myinvention is an improvement on the patent granted to me December 18,1883,'No. 290,396, for drawing-knife, and it is carried out'as follows,reference being had to the accompanying drawings, wherein;

Figure l represents a side elevation of the invention, showing` one endof the blade and its pivoted handle in section. Fig. 2 represents alongitudinal section on the line X X shown in Fig. l. Fig. 3 representsa section on the broken line Y Y shown in Fig l; and Fig. 4. representsa cross-section on the line Z Z, also shown in Fig. l.

Similar letters refer to similar parts wherever they occur on thediderent parts of the drawings.

A represents the blade as usual, having at its ends the shanks or arms da, which are perforated to receive the screws or pins b b to which thehandles are pivoted. The said Shanks are each provided, preferably, withthree locking projections d', d, and a3, as shown in Fig. l. Theprojections d o serve to hold the handles in a closed position upon theblade A, as shown in dotted lines at the left end of Fig. l. Theprojections d d serve to hold the handles locked to the bladeshanks ator about a right angle thereto, as shown in full lines in said Fig. l,and the projections o3 d3 serve to hold the handles locked to saidblade-Shanks in or about a line with the blade, as shown in dotted linesat the right end of Fig. ll Each handle is composed of a wooden part C,having on one side a longitudinal groove c, adapted to receive the bladeA when folded upon it, as shown in dotted lines at the left end of Fig.l.

To each wooden handle C is secured the metallic hinge-piece C', havingeach two parallel shanks C C passing through longitudinal perforationsin the handle C and through perforated capped top and bottoni ferrules dd', substantially as shown and described in m y above-mentioned LettersPatent. Thelower ends of the bifurcated Shanks C O are riveted orotherwise secured to the"A bottom ferrule d, as shown in Fig. 3. Theupper end or head of the hinge-piece Cis forked, as shown at Cin Figs.1,2,and 3, and is pivoted to the shank a bym'eans of the pin, screw, orrivet b.

In one piece with each forked head C3 is made a preferably cylindricalprojection C4, extending at or about a right angle to the hinge-piece Cand its handle C, as shown in Fig. l, and in connection with it and thelocking projections a o @3,1 use a spring-pressed locking device,preferably constructed as follows: On such projection C4 islongitudinally adjustable a sleeve E, having an internal annular spaceor chamber e, in which is located a coiled spring e', the inner end ofwhich rests against the bottom of the chamber e, and having its outerend pressing, preferably, against thehead f of the screw f that isscrewed into the end of the .hinge-piece projection C4, as shown in Fig.2.l

Instead of the headed screwff, a pin may be passedJ through a transverseperforation in the outer end of the projection C4 Without departing fromthe essence of my invention. The spring e causes the sleeve E to beforced toward the fulcrum of the pivoted handle, and in so doing causesthe handle projection C4 to be locked to that one of the bladeprojections a, a, or a3 which for the time being is in a line with it,as shown in Fig. 1. In

` changing the positions of the handles relative to the blade it is onlynecessary to move the sleeves E F. outward sufficiently to disengagethem from the blade projections to which they were locked, and byholding each of such sleeves in its outer position the handles may beswung to the various positions shown in full and dotted lines in Fig. land locked in such positions simply by releasing the hold on thespring-pressed sleeves E E.

The invention is very simple in its construction and operation, and byits use the handles may be locked and folded upon the blade or securedto the latter in or about a line with it or at or about right angles tothe same, thus iuclosing and preventing the cutting-edge ot' ICO theblade from injury when the device is not in use and enabling the bladeto be used with the handles in the positions as above 1nentioned. l

Having thus fully described the nature, construction, and operation ofmy invention, I wish to secure by Letters Patent, and clai 1nl. Theblade A,having each of its ends provided With locking projections, and ahandle pivoted thereto having a locking projection, combined withaspring-pressed sleeve adapted to hold the handle locked to the blade inor about a line and at or about a right angle thereto, substantially asand for the purpose set forth.

2. The blade A, having` each of its ends provided with lockingprojections, and a handle pivoted thereto having a locking projection,combined with a spring-pressed sleeve adaptzo ed to hold the handlelocked to the blade in a closed position in or about a line and at orabout a right angle thereto, substantially as and for the purpose setforth.

3. The blade A, having at each of its ends the locking projections Ct',a, and CL3, and the bifurcated handle-pieces C C3, pivoted to the bladeends and provided each with a pair of shanks C C, secured to the slottedhandles C, combined with the locking projection C? on such bifureatedhandle-piece, and a springpressed looking-sleeve E, substantially as andfor the purpose set forth. l

In testimony whereof l have signed my name to this specication, in thepresence of two subscribing Witnesses, on this 7th day of April, A. D.1890.

JOHN S. OANTELO.

Witnesses:

ALBAN ANDRN, CHARLES S. BARKER.

